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A pulse carrier phase noise measurement device and measurement method

A phase noise, pulse carrier technology, applied in the direction of noise figure or signal-to-noise ratio measurement, to achieve the effect of saving time and effort in the test process, reducing the number and simplifying the measurement steps

Active Publication Date: 2017-03-01
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology

[0014] The invention proposes a pulse carrier phase noise measurement device and measurement method, adopts pulse synchronization detection and dynamic adjustment technology, realizes real-time extraction and synchronization of pulse modulation parameters, and solves the problem of pulse modulation synchronization between the reference source and the measured source

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  • A pulse carrier phase noise measurement device and measurement method
  • A pulse carrier phase noise measurement device and measurement method
  • A pulse carrier phase noise measurement device and measurement method

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Embodiment Construction

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0048] At present, there are two main methods for measuring pulse-modulated carrier phase noise: the first method is the spectrum analyzer method, and the second method is a phase detection method that combines a dual-channel pulse generator, a broadband oscilloscope and a pulse carrier phase noise measurement device. test.

[0049] The spectrum analyzer method requires the pulse modulation carrier to be completely synchronized with the sampling and analysis o...

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Abstract

The present invention proposes a pulse carrier phase noise measurement device, which is connected to the measured source, and includes a pulse adjustment unit, a phase detector, a pulse modulator and a reference source inside, and the pulse adjustment unit passes through the input end of the pulse carrier phase noise measurement device. The coupler couples and receives a signal under test, and couples and receives a signal under test and a reference signal through the coupler at the input of the phase detector, and performs pulse synchronization adjustment inside the pulse adjustment unit, and the synchronized source under test and The reference source outputs an intermediate frequency signal after phase discrimination, and adjusts the reference source after processing by a low-pass filter, PRF filter, loop filter, etc., so that the reference source and the measured source are locked in quadrature. The / D sampling unit and the analysis operation unit obtain the phase noise of the measured source under the pulse modulation state. The pulse synchronization adjustment of the present invention can be automatically completed by the internal circuit without manual adjustment and intervention, and the setting and testing process is greatly simplified.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a pulse carrier phase noise measurement device, and also to a pulse carrier phase noise measurement method. Background technique [0002] Phase noise is an important indicator for evaluating the short-term stability of signal frequency. The performance of phase noise has an important impact on the overall performance of electronic systems, such as the range of radar systems, target resolution, bit error rate of digital communication systems, and image signals. Indexes such as quality, satellite positioning accuracy, and signal interference between adjacent channels of the receiver system are all related to the carrier phase noise of the system frequency source. [0003] Because pulse modulation signals have strong communication security and anti-interference performance, they have been widely used in secure communication systems and radar equipment. Most of the transmitted and re...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/26
Inventor 杜念文朱伟凌伟刘强辛义磊
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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